Hanna Instruments Checker® HC colorimeter for low range phosphate: accurate digital readout, no more subjectivity from color-matching test kits.
The Hanna Instruments HI713 Checker® HC is a pocket-sized colorimeter that measures phosphate in the low range with a digital readout, instead of matching colors by eye against a chemical test kit chart.
Phosphate is a common food additive that enhances flavor and acts as a buffering agent, and it is important for plant root growth and development, which is why it is also present in fertilizers. However, high concentrations of phosphate are harmful to the environment, so it is closely monitored in natural and municipal waters.
The instrument uses an adaptation of the Ascorbic Acid method: an LED light source at 525 nm passes through the sample and a silicon photocell measures the color change, converting it into a precise ppm reading.
Supplied with two sample cuvettes with caps, a phosphate LR reagent starter kit (6 tests), battery, instructions, and quick start guide.